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Zakładka z wyszukiwarką danych komponentów |
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TEA6845AH Arkusz danych(PDF) 10 Page - NXP Semiconductors |
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TEA6845AH Arkusz danych(HTML) 10 Page - NXP Semiconductors |
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10 / 48 page  2001 Apr 12 10 Philips Semiconductors Product specification New In Car Entertainment (NICE) car radio TEA6845AH; TEA6845H 7.3.5 AM NOISE DETECTOR AND BLANKER The detection point for the AM noise blanker is the output stage of AM mixer 1, while blanking is realized at the output of the mixer 2. Trigger sensitivity can be modified by changing the resistor value at pin AMNBHOLD. 7.3.6 FM AND AM LEVEL DETECTOR FM and AM level detectors provide the temperature compensated output voltage. The starting points and slopes of the level detector outputs are programmable via the I2C-bus. 7.4 Test mode The test mode of the IC is activated by: • Sending the test byte (byte 5) to the IC • Connecting pin fref through a 100 kΩ resistor to VDDA1 • Applying 50 µA to pin fref. If the test mode is enabled by pin fref: • The settling time of the AM IF2 AGC is reduced to less than 100 ms in the nominal application • The digital-to-analog converters for the antenna DAA and the level DAA can be clocked directly by the SCL line of the I2C-bus • The output at pin fref can be selected by the I2C-bus: TEA6880H or TEF6890H reference frequency, PLL reference frequency or PLL programmable divider output frequency • The RDS update control circuit can be clocked directly via pin DAATD • Pin T1AMAGC can be used to enable the load PLL circuit of the RDS update control circuit • Charge pumps can be set into 3-state mode. 8 LIMITING VALUES In accordance with the Absolute Maximum Rating System (IEC 60134). Notes 1. To avoid damages and wrong operation it is necessary to keep all 8.5 V supply voltages at a higher level than any 5 V supply voltage. This is also necessary during power-on and power-down sequences. Precautions have to be provided in such a way that interferences can not pull down the 8.5 V supply below the 5 V supply. 2. Machine model (R = 0 Ω, C = 200 pF). 3. Human body model (R = 1.5 k Ω, C = 100 pF). SYMBOL PARAMETER CONDITIONS MIN. MAX. UNIT VDDA1 analog supply voltage 1 for on-chip power supply −0.3 +10 V VDDA2 analog supply voltage 2 for on-chip power supply −0.3 +6.5 V VDDA3 analog supply voltage 3 for VCO −0.3 +10 V VDDA4 analog supply voltage 4 for tuning PLL −0.3 +10 V VDDA5 analog supply voltage 5 for FM and AM RF −0.3 +10 V VDDA6 analog supply voltage 6 for IF amplifier 1 and 2 −0.3 +10 V VDDD digital supply voltage −0.3 +6.5 V ∆VDD8.5-DD5 difference between any 8.5 V supply voltage and any 5 V supply voltage note 1 −0.3 − V Tstg storage temperature −55 +150 °C Tamb ambient temperature −40 +85 °C Ves electrostatic handling voltage note 2 −200 +200 V note 3 −2000 +2000 V |
Podobny numer części - TEA6845AH |
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Podobny opis - TEA6845AH |
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